<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>其他常用样式</title>
<style>
	#box{ width:200px; height:50px; background:rgba(255,0,0,0.5); }
</style>
</head>
<body>
<div id="box">做真实的自己，用良心做教育。</div>
</body>
</body>
</html>




